Abstract：The analytical result in structural dynamics is restricted by the selection of damping models.Therefore, characterization of damping forces and damping parameters identification in a vibrating structure has long been an active area of research. Because of the complexity of damping mechanism in structures, the applicability of available damping models is limited. In this paper, a more general non-viscous damping model, in which the damping force is related to the velocity history, is introduced. By a complex modal analysis to the dynamics system with this type of non-viscous damping in Laplace domain, a method for damping coefficients identification is derived. Numerical example shows that the proposed method can effectively identify the damping coefficients in a system with this non-viscous damping model, and the result is consistent with those of viscous damping model when the non-viscous effect of the structural damping behavior is not significant.
2010, Vol. 29 
